The Power-Block system gives you unlimited flexibility to design electrical distribution systems that range from simple to complex. A modular system for mounting a comprehensive range of fuse and relay modules. They are easily expandable to accommodate varying configurations, and allow for future growth and add-on circuits. Choose from a variety of power-blok modules that accommodate everything you need in power distribution or circuit protection. It is the totally modular way to build your own junction block. Frames of 1, 2, 4 and 7 modules carry different configurations of Mini blade fuse, ATO blade fuse, Maxi blade fuse, Micro relay, Standard ISO relay and Power relay modules. Terminals are crimped and inserted from beneath. All modules and terminals must be ordered separately.